How To Replace Multiple Substrings With A New String In JavaScript 2023

To replace multiple substrings with a new string in JavaScript, you can use the replace() method. This method accepts two arguments: the substring to be replaced, and the new string that will replace it.

If you want to replace multiple substrings with the same new string, you can use the replace() method multiple times, or you can use a regular expression with the replace() method. A regular expression is a pattern that describes a set of strings.

Here is an example of how you can use a regular expression and the replace() method to replace multiple substrings with the 'me' string in a given string:

const originalString = 'Hello, my name is John. I like cats and dogs, -haha- and -taba- and -ajhe-.';
const subStrings = ['-haha-', '-taba-', '-ajhe-'];
const newString = 'me';

// Create a regular expression that matches any of the substrings in the array
const regex = new RegExp(subStrings.join('|'), 'g');

// Replace all matches with the newString
const updatedString = originalString.replace(regex, newString);

console.log(updatedString); // 'Hello, my name is John. I like cats and dogs, me and me and me.'

In this example, the original string is 'Hello, my name is John. I like cats and dogs, -haha- and -taba- and -ajhe-.', and the array of substrings to be replaced is ['-haha-', '-taba-', '-ajhe-'].

First, a regular expression is created that matches any of the substrings in the array. This regular expression is then used with the replace() method to replace all matches with the 'me' string. The resulting string, after the replacements are made, is 'Hello, my name is John. I like cats and dogs, me and me and me.'.